Measurement of Downwash at a Mach Number of 1.45 Behind Two Wings of Finite Span
| Autor: | W. F. Hilton |
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| Rok vydání: | 1951 |
| Předmět: | |
| Zdroj: | The Journal of the Royal Aeronautical Society. 55:43-51 |
| ISSN: | 2398-4600 0368-3931 |
| Popis: | Measurements were made of the downwash effects behind two finite wings 3.1 percent, thick, having square and 20° raked tips respectively. The tests were conducted at a Mach number of 1.45 and a Reynolds number of 1.2 millions by traversing a yawmeter 1.62 chords behind the trailing edge of the finite wings.In general, a maximum downwash of the order of ½° per degree of wing incidence was observed in that portion of the tip Mach cone behind the wing, and a maximum upwash of similar magnitude was observed in that part of the tip Mach cone situated outboard of the wing.Thus it is apparent that these effects are large enough to affect the lift on any surface situated in the tip Mach cone behind a finite wing. In particular, placing the rear surface in the downwash region behind a finite wing, will tend to reduce the overall lift while placing it in the upwash region will tend to magnifiy the variations of lift initiated by the finite wing. |
| Databáze: | OpenAIRE |
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